package com.example.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @ClassName PaymentService
 * @Author Admin
 * @Date 2020/9/5 9:38
 * @Version 1.0
 **/
@Service
public class PaymentService {
    /**
     * 正常访问，肯定OK的方法
     *
     * @param id
     * @return
     */
    public String paymentInfo_ok(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_ok,id" + id + "\t" + "测试成功";
    }

    /**
     * 服务降级，当调用此方法超过 3000  也就是 3秒时。直接调用服务降级 fallbackMethod 指定的方法
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")})
    public String paymentInfo_TimeOut(Integer id) {
        int timeNumber = 3;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_TimeOut,id" + id + "\t" + "耗时(秒)：" + timeNumber;
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "系统繁忙，请稍后重试！,id:" + id + "\t" + "o(╥﹏╥)o";
    }

    //=====服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),//是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "1000"),//时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),//失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException(".......id不能为负数");
        }
        final String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号：" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能是负数，请稍后重试， id：" + id;
    }
}
